Clip-On Personal Alarm - Simply pull it off your shirt, jacket, backpack (or whatever it is attached to) and a piercing alarm sounds attracting attention and giving you time to get away. The Container Store
60 Projects to Make with Dollar Store Supplies - DIY & Crafts. I see this stuff and get all excited and then wait for bus nano to do etc I actually visit my dollar store. I'm guessing dollar stores in other parts of the country must be nicer.